JP6237985B2 - Kitchen faucet - Google Patents

Description

  The present invention relates to a kitchen faucet that is used in a kitchen and supplies water.

  As a general kitchen faucet, what is described in the following patent document 1 is known. This kitchen faucet is used by being attached to the upper surface of the kitchen or the like, a part of which extends toward the sink side of the kitchen, and a shower head is provided at the tip. A plurality of sprinkling holes are formed in the lower surface of the shower head, and a water flow discharged through each sprinkling hole is supplied to a sink below the shower.

  The kitchen faucet described in the following Patent Document 1 has a problem in terms of workability. In other words, the shower head covers the upper part of the sink and supplies the shower water flow almost directly below, so that a large object to be cleaned cannot be arranged in the space between the sink and the shower head, and the cleaning work becomes difficult. was there.

  As a solution to the problem of workability, a kitchen faucet described in Patent Document 2 below has been proposed. The kitchen faucet includes a water discharge portion that extends upward while inclining toward the user side, and a plurality of water spray holes are formed on the outer surface of the water discharge portion on the sink side. And the water flow discharged through each watering hole is supplied as a shower water flow on the front side where the user is present and obliquely downward.

  The shower water flow that is supplied with an inclination from the water discharge portion passes through a cleaning region that is a central portion between the front surface of the sink and the rear surface of the sink and is a region where the user performs a cleaning operation. Therefore, it is possible to secure a wide space that is not blocked by the water discharger above the cleaning region. Thereby, even if it is a large-sized to-be-cleaned object, it becomes easy to arrange | position to a washing | cleaning area | region and to perform a cleaning operation.

JP 2007-170135 A Japanese Patent No. 4449083

  In the kitchen faucet described in Patent Document 2, the flow velocity of the water flow discharged from each of the plurality of water spray holes is required to be a predetermined value or more. This is because, when the flow velocity is lower than the predetermined value, the shower water flow cannot reach the cleaning region and passes through the sink rear surface side with respect to the cleaning region. Such a request is not imposed in the form in which the shower water flow is supplied almost directly below the shower head as in the kitchen faucet described in Patent Document 1, and the shower water flow is supplied obliquely downward and forward. It is unique to the form.

  As a method of setting the flow velocity of the water flow discharged from each sprinkling hole to a predetermined value or higher so that the shower water flow can reach the cleaning region, the total cross-sectional area of a plurality of sprinkling holes and the cross-sectional area of each sprinkling hole are compared. It is most convenient to make it small. However, in this case, there is a problem that a small (thin) water flow having a small cross-sectional area is discharged from each sprinkling hole, and it becomes difficult to peel off dirt adhered to the object to be cleaned.

  Therefore, the present inventors have made various studies to solve this problem, and as one of the studies, the inventors tried to improve the cleaning power by mixing bubbles in the water flow discharged from each water spray hole. When air bubbles are mixed in the water flow while changing the amount, a region with a large flow velocity and a region with a small flow velocity are locally generated in the water flow, and a water mass with a large cross-sectional area is formed in the water flow due to this flow velocity difference. Is expressed. The water flow with a small cross-sectional area discharged from each sprinkling hole is changed to a water mass, and this water mass and water droplets formed by diverting the water mass from the water flow are supplied to the object to be cleaned, improving the cleaning power I will try to let you.

  By making the water flow into a water mass in this way, the impact at the time of landing increased compared with the water flow having a small cross-sectional area, and it was confirmed that the cleaning power was improved. However, a new problem in actual use has arisen that the water splash when the water mass reaches the object to be cleaned becomes remarkable. In particular, in a kitchen faucet that employs a configuration in which a shower water flow is supplied obliquely downward and forward, and the water flow is formed into a water mass, water splashing to the user side becomes remarkable.

  The present invention has been made in view of such problems, and its purpose is to secure a wide space above the cleaning region and suppress water splashing to the user side while exhibiting high cleaning performance. It is to provide a kitchen faucet that can be used.

  In order to solve the above problems, a kitchen faucet according to the present invention is a kitchen faucet that is used in a kitchen and supplies water, and is provided on an upper side with respect to an attachment part attached to the kitchen. A spout portion extending upward so as to incline toward the front side where the user is present, and a plurality of water sprinkling holes provided on an outer side surface on the front side of the spout portion. A shower water spouting section that supplies a plurality of water streams discharged from the front as a shower water stream obliquely downward, and a bubble mixing section that mixes bubbles into the water supplied to the shower water spouting section. The plurality of water holes are at least divided into a front water hole group provided on the front side and a rear water hole group provided on the rear side of the front water hole group. In the kitchen faucet according to the present invention, the amount of air bubbles mixed into the water flow discharged from the front watering hole group is smaller than the amount of air bubbles mixed into the water flow discharged from the rear watering hole group. Thus, it is provided with the bubble movement suppression means which suppresses that the bubble mixed by the said bubble mixing part moves to the said front watering hole group side.

  In the kitchen faucet according to the present invention, the amount of air bubbles mixed in the water flow discharged from the front watering hole group out of the plurality of watering holes is the amount of air bubbles mixed in the water flow discharged from the rear watering hole group. Less than. As a result, a relatively large water mass is formed in the water flow discharged from the rear-side sprinkling hole group, and the cleaning power at the time of landing on the object to be cleaned is increased, and the water is discharged from the front-side sprinkling hole group close to the user. A relatively small water mass can be formed in the water flow to suppress water splashing at the time of landing. In other words, a shower water flow is supplied toward the front diagonally downward where the user is present, improving the workability during cleaning and improving the cleaning performance using a large water mass, but the user who becomes a problem in actual use It is possible to suppress water splashing to the side.

Further, in the kitchen faucet according to the present invention, the air bubble mixing unit has at least one injection port that increases the flow rate of water supplied from the upstream side and injects it as a jet water flow on the downstream side, and the jet water flow has an air suction unit for sucking the air by the negative pressure generated with the passage, and a aeration unit to be mixed into the injection water flow sucked air by the air suction part of the injection port, the it is also preferably provided near vicinity of the shower water discharger.

If the distance from the spray port to the shower water discharger is large, the distance from the bubble mixing part to the shower water discharger also increases, so that the air bubbles inside the air bubbles are combined while the water containing the bubbles flows between them. There is a tendency to grow. Since the buoyancy acting on the bubbles increases when the bubbles become large in this way, the bubbles are located on the front side (upper side in the spout portion extending upward so as to incline forward) among the plurality of water spray holes. Bubbles move to the front watering hole group side.

Therefore, in this preferred embodiment, the injection port, by providing the near vicinity of the shower water discharge portion, and reduce the distance from the bubbly portion to the shower water discharge portion, suppressing the movement of the coupling and the front-side water spray hole group of the bubble be able to.

In the kitchen faucet according to the present invention, before Symbol injection port, the injection water flow injection, the movement of air bubbles into the front nozzle holes group side is configured to be suppressed is preferable.

  In this preferred embodiment, it is possible to use the jet water flow that sucks air by the ejector action for mixing bubbles in suppressing the movement of bubbles toward the front watering hole group side.

  Moreover, in the kitchen faucet according to the present invention, it is also preferable that the injection port is configured to inject an injection water flow toward the rear side water spray hole group.

  In this preferred embodiment, since the injection port injects the injection water flow toward the rear watering hole group side, the water pressure in the vicinity of the rear watering hole group is increased, and the bubbles mixed in by the air bubble mixing part are removed from the rear watering hole. It is possible to facilitate discharge from the group. Thereby, it becomes possible to further suppress the movement of bubbles to the front watering hole group.

  Further, in the kitchen faucet according to the present invention, when the shower spout is viewed in a direction in which the jet outlet jets the jet water flow, at least one of the sprinkling holes constituting the jet outlet and the rear-side sprinkling hole group. It is also preferred that the parts are arranged so as to be polymerized.

  In this preferable aspect, at least a part of the jet water flow jetted from the jet nozzle can be discharged through the water spray holes constituting the rear water spray hole group without colliding with the inner wall surface of the shower water spouting portion. . Thereby, since the air bubbles existing around the rear watering hole group are also drawn into the jet water flow and discharged, the movement of the air bubbles toward the front watering hole group side can be further suppressed.

  Further, in the kitchen faucet according to the present invention, between the front watering hole group and the rear watering hole group in the aeration unit, the jet water flow collides with an inner wall surface of the shower water discharging part. It is also preferable to provide a jet movement suppression wall that suppresses the movement of bubbles to the front watering hole group by suppressing the flow to the front watering hole group side.

  In this preferred embodiment, the jet flow is prevented from colliding with the inner wall surface of the shower water spouting portion and flowing toward the front watering hole group by the jet movement suppression wall, so that the bubbles mixed in the jet flow are on the front side. It becomes possible to suppress moving to the sprinkling hole group.

  ADVANTAGE OF THE INVENTION According to this invention, while ensuring a large space above a washing | cleaning area | region, while exhibiting high washing | cleaning performance, the water faucet for kitchens which can suppress the water splash to a user side can be provided. .

It is a schematic diagram showing the system kitchen concerning embodiment of this invention. It is a side surface schematic diagram showing the state where the shower water flow is discharged from the kitchen faucet concerning this embodiment. It is sectional drawing of the spout part of the kitchen faucet concerning this embodiment. It is the schematic diagram which looked at the water spray board of the kitchen faucet which concerns on this embodiment in the direction in which an injection port injects a jet water flow. It is a schematic diagram which shows the water spray board vicinity of the kitchen faucet which concerns on this embodiment. It is a schematic diagram which shows the backflow in the vicinity of the watering board of the kitchen faucet concerning this embodiment. It is a schematic diagram of the water flow discharged from the water sprinkling hole of the kitchen faucet concerning this embodiment. It is a schematic diagram which shows the landing of the water supplied from the kitchen faucet which concerns on this embodiment.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In order to facilitate understanding, the same components are denoted by the same reference numerals as much as possible in the drawings, and redundant description is omitted.

  First, with reference to FIG. 1, the use condition of the kitchen faucet which concerns on embodiment of this invention is demonstrated. FIG. 1 is a schematic diagram illustrating a system kitchen according to an embodiment of the present invention.

  The system kitchen 10 includes a sink 20 and a kitchen faucet KF used by being attached to the sink 20.

  The sink 20 has a sink upper surface 22 and a sink bottom surface 24. The sink 20 may have a cooking table (not shown) extending to at least one of the left side and the right side of the sink upper surface 22.

  The kitchen faucet KF is provided on the back side of the sink 20 as viewed from the user, that is, behind the system kitchen 10 and on the sink upper surface 22, and is attached to the sink upper surface 22 and above the attachment portion 30. It has a spout part 40 provided on the side. The attachment portion 30 is provided substantially perpendicular to the sink upper surface 22, but the spout portion 40 extends upward so as to incline toward the front side where the user is present. This inclination angle is, for example, about 60 degrees with respect to the sink upper surface 22. However, this inclination angle can be changed as appropriate.

  A rectifying water discharger 40r and a shower water discharger 40s are provided on the outer surface on the front side of the spout unit 40. Since the outer surface on the front side of the spout unit 40 is inclined with respect to the sink upper surface 22 and the sink bottom surface 24, the water supplied from the rectifying water discharger 40 r and the shower water discharger 40 s are both sinks. The upper surface 22 and the sink bottom surface 24 are supplied obliquely. In the present specification, the term “water” includes “hot water”.

  Next, the supply of the shower water flow from the kitchen faucet according to the embodiment of the present invention will be described with reference to FIG. FIG. 2 is a schematic side view illustrating a state in which a shower water flow is supplied from the kitchen faucet according to the present embodiment.

  As shown in FIG. 2, when water having a flow rate of a predetermined value or more is supplied to the kitchen faucet KF and supplied from the shower water discharge unit 40 s, the water is directed to the sink 20 as a shower water flow Ws composed of a plurality of water flows. Supplied. The shower water flow Ws is supplied to the sink upper surface 22 and passes through a region WA (hereinafter referred to as “cleaning region”) where the sink upper surface 22 intersects with the central portion of the sink front surface 26 and the sink rear surface 28.

  Further, the shower water flow Ws supplied obliquely from the shower water discharger 40s passes through the cleaning area WA in an inclined manner. For this reason, unlike the general kitchen faucet that supplies water directly from the spout, the kitchen faucet KF does not cover the cleaning area WA with the spout portion 40. Therefore, it is possible to secure a wide space above the cleaning area WA, and even a large object to be cleaned can be easily disposed and cleaned in the cleaning area WA.

  On the other hand, when water having a flow rate equal to or higher than a predetermined value is supplied to the kitchen faucet KF and supplied from the rectifying and discharging unit 40r, the water is supplied toward the sink 20 as a rectifying Wr that is a single water flow. The rectifying water discharger 40r is disposed above and in front of the shower water discharger 40s and behind the cleaning area WA. The rectification Wr supplied from the rectification water discharger 40r passes through the cleaning area WA, similarly to the shower water flow Ws. Therefore, it becomes possible for the user to perform the cleaning without moving the object to be cleaned from the cleaning area WA according to the water discharge form, and the workability during the cleaning can be improved.

  Next, with reference to FIG. 3, the spout part of the kitchen faucet which concerns on embodiment of this invention is demonstrated. FIG. 3 is a cross-sectional view of the spout portion of the kitchen faucet according to the present embodiment.

  The spout part 40 has a spout part main body 410 whose outer shape has a substantially cylindrical shape. A water supply channel 411 extending obliquely upward along the extending direction of the spout unit 40 is provided inside the spout unit main body 410, and water supplied from the upstream flows obliquely through the inside of the water supply channel 411. Guided upward.

  A switching chamber 413, which is a space for receiving water flowing through the water supply channel 411, is formed at the downstream end of the water supply channel 411 and at the upper end inside the spout unit main body 410. Further, on the downstream side of the switching chamber 413, a rectifying channel 414 and a shower channel 415 are provided so as to communicate with the switching chamber 413. The flow path for rectification 414 extends toward the sink 20, and the flow path for shower 415 extends obliquely downward along the direction in which the spout portion 40 extends.

  A switching valve (not shown) is arranged in the switching chamber 413, and the user's user can guide the water flowing out of the switching chamber 413 to either the rectifying channel 414 or the shower channel 415. It can be selected by operation.

  When the switching valve is set to guide the water in the switching chamber 413 to the rectifying flow path 414, the water passes through the mesh-shaped rectifying network 419 arranged in the rectifying flow path 414 as indicated by an arrow W3. Further, the water is supplied from the rectifying water discharger 40r toward the lower sink 20 (not shown in FIG. 3) as indicated by an arrow W4. The rectification Wr supplied at this time becomes a single water flow as shown in FIG.

  On the other hand, when the switching valve is set to guide the water in the switching chamber 413 to the shower channel 415, the water flowing into the shower channel 415 as shown by the arrow W5 is arranged downstream thereof. It reaches the injection plate 420. The ejection plate 420 is a thin plate-like member extending along the direction in which the spout portion 40 extends, and is formed so that a plurality of ejection ports 421 penetrates in the thickness direction. The water that has reached the injection plate 420 has its flow velocity increased by passing through the plurality of injection ports 421 and is injected downstream as a plurality of injection water flows.

  A throat member 440 is disposed on the downstream side of the ejection plate 420 at a predetermined interval from the ejection plate 420. The throat member 440 has a plurality of throats 441 formed at positions corresponding to the plurality of injection ports 421 of the injection plate 420. For this reason, the jet water flow injected from the plurality of injection ports 421 passes through the throat 441 provided on each downstream side and reaches the downstream side of the throat member 440.

  Here, an air introduction port 416 is formed on the outer surface on the front side of the spout unit main body 410. Further, in the spout part main body 410, the air inlet 416 extends from the air inlet 416 toward the center of the spout part main body 410, and further extends obliquely upward along the direction in which the spout part 40 extends. An air introduction path 417 is formed. The air introduction path 417 communicates with an air suction chamber 430 that is a space formed between the injection plate 420 and the throat member 440.

  As a result, when the jet water flow injected from the plurality of injection ports 421 passes through the air suction chamber 430, the negative pressure generated along with it causes the inside of the air suction chamber 430 to pass through the air introduction port 416 and the air introduction path 417. Air is sucked in. The sucked air passes through the plurality of throats 441 together with the jet water flow and reaches the downstream side of the throat member 440.

  An air mixing chamber 450 that is a larger space than the throat member 440 is formed on the downstream side of the throat member 440, and a water spray plate 460 is disposed so as to cover the downstream side of the air mixing chamber 450. The water spray plate 460 is a plate-like member extending along the direction in which the spout unit 40 extends, and constitutes the shower water discharge unit 40s. Further, the water spray plate 460 is formed with a plurality of water spray holes 461 penetrating in the thickness direction.

  The jet water flow that has passed through the plurality of throats 441 together with the air sucked into the air suction chamber 430 is mixed with air in the air mixing chamber 450 as described in detail later. Air is bubbled and mixed into the jet stream. The bubble-mixed water, which is a mixture of bubbles, passes through each of the plurality of sprinkling holes 461 and is discharged to the outside of the spout unit main body 410 as a plurality of water streams as indicated by arrows W6. A shower water stream composed of a plurality of water streams is supplied toward the sink 20 (not shown in FIG. 3).

  Next, with reference to FIG. 4, the watering board of the kitchen faucet which concerns on embodiment of this invention is demonstrated. Drawing 4 is a mimetic diagram which looked at the sprinkling board of the kitchen faucet concerning this embodiment in the direction where an injection mouth injects a jet water flow.

  The water spray plate 460 is formed so that the length direction (front-rear direction) dimension is larger than the width direction (left-right direction) dimension. The plurality of water spray holes 461 penetrating the water spray plate 460 in the thickness direction (the depth direction of the paper) are all substantially circular in cross-section and are arranged in seven rows along the front-rear direction, and pass through the center of the water spray plate 460 in the width direction. It arrange | positions so that it may become a control | contrast with the centerline CL. Moreover, the some water spray hole 461 comprises the front side water hole group 461F provided in the front side, and the back side water hole group 461B provided in the back side rather than the front side water hole group 461F.

  In FIG. 4, the plurality of injection ports 421 of the injection plate 420 provided on the upstream side (the depth side of the drawing) of the watering plate 460 are indicated by broken lines. The cross-sectional shape of the injection port 421 is a substantially circular shape having a diameter larger than that of the water spray hole 461. The injection port 421 is configured to inject an injection water flow toward the rear-side water spray hole group 461B. Further, when the plurality of injection ports 421 are viewed in the direction in which the injection water flow is injected, the injection ports 421 and at least a part of the watering holes 461 constituting the rear side watering hole group 461B are arranged to be superposed. . On the other hand, the sprinkling holes 461 constituting the front-side sprinkling hole group 461F do not overlap with the injection ports 421. Further, the arrangement of the injection ports 421 is not contrasted with the center line CL unlike the injection ports 421.

  Next, with reference to FIG.5 and FIG.6, mixing of the air in the kitchen faucet which concerns on embodiment of this invention is demonstrated. FIG. 5 is a schematic diagram showing the vicinity of the watering plate of the kitchen faucet according to the present embodiment, and FIG. 6 is a schematic diagram showing the backflow in the vicinity of the watering plate of the kitchen faucet according to the present embodiment.

  As shown in FIG. 5, the water that has flowed through the shower flow path 415 inside the spout unit main body 410 and reached the injection plate 420 passes through the injection ports 421a to 421c, and the jet water flow Ja to the downstream side of the injection plate 420. Injected as Jc. Since the injection ports 421a to 421c penetrate the injection plate 420 substantially parallel to each other, the jet water flows Ja to Jc passing therethrough are also injected substantially parallel. Further, the injection ports 421a to 421c are arranged so that the jet water streams Ja to Jc injected from each of them collide with different positions of the water spray plate 460.

  When the jet water flows Ja to Jc pass through the air suction chamber 430 provided between the jet plate 420 and the throat member 440, a negative pressure is generated in the air suction chamber 430 (inside the air suction chamber 430). Becomes negative pressure). For this reason, air is sucked into the air suction chamber 430 along the ejection plate 420 by a so-called ejector action as indicated by an arrow A1. This air is sucked from the outside of the spout unit body 410 through the air inlet 416 and the air inlet path 417 (not shown in FIG. 5).

  The air sucked into the air suction chamber 430 is further drawn in by the jet water streams Ja to Jc, changes its flowing direction (arrow A2), and flows into the throats 441a to 441c together with the jet water streams Ja to Jc.

  As described above, the cross-sectional shapes of the ejection ports 421a to 421c are substantially circular with a diameter larger than that of the water spray holes 461. Therefore, the cross-sectional shapes of the jet water streams Ja to Jc jetted from the jet ports 421a to 421c are also substantially circular with a diameter larger than that of the water spray holes 461. Moreover, as shown in FIG. 4, when it sees in the direction which the some injection nozzle 421 (421a-421c) injects an injection water flow (Ja-Jc), the injection nozzle 421 (421a-421c) and the back side It arrange | positions so that at least one part (sprinkling hole 461a-461c) of the sprinkling hole 461 which comprises the sprinkling hole group 461B may superpose | polymerize. For this reason, a part of water of the jet water flows Ja to Jc passes through the water spray holes 461a to 461c superposed on the jet ports 421a to 421c as indicated by arrows Wsa to Wsc. Other water interferes with the watering plate 460 and cannot directly pass through the watering holes 461a to 461c. On the upstream side of the watering plate 460, this jet water flow that could not pass is temporarily retained (retained water Wst).

  When a predetermined time elapses after the injection of the injection water flows Ja to Jc at the injection ports 421a to 421c starts, the water level of the staying water Wst rises, and the gas-liquid interface Wst1 enters into the throats 441a to 441c. For this reason, the jet water flows Ja to Jc enter the gas-liquid interface Wst1 of the staying water Wst inside the throats 441a to 441c. The gas-liquid interface Wst1 is greatly disturbed by the rush of the jet water flows Ja to Jc, and the air on the gas-liquid interface Wst1 is caught inside as indicated by an arrow A3. The air entrained in the stagnant water Wst becomes bubbles, so that the stagnant water Wst becomes bubble mixed water.

  When the jet water streams Ja to Jc enter, the bubble mixed water is agitated in the vicinity of the plurality of water spray holes 461 of the water spray plate 460. This agitation promotes the bonding or splitting of bubbles in the bubble-containing water, and bubbles of various sizes are generated. For this reason, bubble mixed water in which bubbles of various sizes are mixed is discharged from the plurality of water spray holes 461.

  In the kitchen faucet KF, various ideas are made so as to suppress the bubbles mixed in the air mixing chamber 450 from moving to the front watering hole group 461F side. First, as described above, the injection port 421 is configured to inject an injection water flow toward the rear-side water spray hole group 461B. Therefore, the water pressure in the vicinity of the rear watering hole group 461B is increased, and the air bubbles mixed in the aeration chamber 450 are easily discharged from the rear watering hole group 461B. Thereby, the movement of the bubble to the front side watering hole group 461F side is suppressed.

  The aeration chamber 450 is provided on the upstream side and in the vicinity of the shower water discharger 40s. Thereby, the water in which bubbles are mixed in the air mixing chamber 450 is immediately discharged from the plurality of water spray holes 461. For this reason, the front side watering located on the front side (upward side in the spout part 40 extended upward so that it may incline to the front side) by buoyancy is increased by combining bubbles in the water in the aeration chamber 450. It is suppressing that a bubble moves to the hole group 461F side.

  Further, since each of the injection ports 421a to 421c and the water spray holes 461a to 461c are arranged in an overlapping manner, at least a part of the jet water flow Ja to Jc injected from the injection ports 421a to 421c interferes with the water spray plate 460. Without making it, it can be discharged through the watering holes 461a to 461c constituting the rear side watering hole group 461B. Thereby, since the air bubbles existing around the rear watering hole group 461B are also drawn into the jet water flow and discharged, the movement of the air bubbles toward the front watering hole group 461F is suppressed.

  As shown in FIG. 6, an end surface 443 that is a flat surface facing the watering plate 460 is provided on the outer surface of the throat member 440. The end surface 443 of the throat member 440 prevents the jet water streams Ja to Jc that collide with the water spray plate 460 from flowing backward toward the jet ports 421a to 421c, as indicated by an arrow W8. For this reason, the flow distance of bubble mixed water until it discharges from the some water spray hole 461 can be shortened. Thereby, it is possible to suppress the bubbles from being combined and unnecessarily increase, and to surely change the flow velocity of the water flow discharged from the plurality of water spray holes 461 as described later.

  In addition, the forward movement of the bubbles Ba in the staying water Wst is suppressed by the water flow of the jet Ja that enters the staying water Wst, and the bubbles Ba are drawn into the jet Ja as they are to the outside from the sprinkling holes 461a. Discharged. Further, the movement of the stagnant water Wst to the front side is hindered by the inner wall surface 442a of the throat 441a, and the bubbles Bb adhere to the inner wall surface 442a, thereby suppressing the movement of the bubbles Bb toward the front watering hole group 461F. The

  Next, with reference to FIG. 7, the behavior of a water flow mixed with bubbles will be described. Drawing 7 is a mimetic diagram of the water flow discharged from the watering hole of the kitchen faucet concerning this embodiment.

  In the present embodiment, a large water mass is formed by changing the flow velocity by mixing bubbles in the discharged water without using a large pump or the like.

  As described above, the bubble mixed water is generated on the upstream side of the water spray plate 460, but the amount of bubbles mixed in the water discharged from the plurality of water spray holes 461 indicates that the bubbles are unstable in water. For this reason, it is not always constant. For this reason, fluctuation occurs in the flow velocity of the water flow discharged from each of the plurality of water spray holes 461. Of this water flow, the portion where the amount of mixed bubbles is relatively large has a higher flow velocity than the portion where the amount of bubbles is relatively small.

  When the flow velocity fluctuates in the water flow discharged in this way, as shown in FIG. 7A, the water flow J ejected from the sprinkling holes 461 is part Wp1, part Wp2, part Wp3, part Wp4, The part Wp5 is included. Assuming that the flow velocities of these parts are V1, V2, V3, V4, and V5, V1 (≈V5) <V2 (≈V4) <V3.

  Therefore, since the flow rate of the part Wp3 is larger than that of the part Wp2 as it moves from (A) to (C) in FIG. 7 immediately after discharge, the part Wp3 merges with the part Wp2 and further merges with the part Wp1 to generate a large amount of water. It becomes a lump.

  As described above, the portion Wp3 having the maximum flow velocity is sequentially combined with the portion Wp2 and the portion Wp1 in front of the portion, thereby forming a large lump and landing on the object to be cleaned. The water mass is repeatedly expressed by the fluctuation of the flow velocity repeatedly occurring in the discharged water flow. It can be expected that water in a water mass state having a large collision energy exhibits a high cleaning power against dirt adhering to the object to be cleaned.

  Next, with reference to FIG. 8, the water splash after landing on a to-be-cleaned object is demonstrated. FIG. 8 is a schematic diagram showing the landing of water supplied from the kitchen faucet according to the present embodiment. FIG. 8A shows how the user cleans the object to be cleaned by the shower water flow supplied from the kitchen faucet, and FIG. 8B shows the behavior of water near the object to be cleaned.

  As described above, the kitchen faucet KF according to the present embodiment is configured to suppress the movement of bubbles toward the front watering hole group 461F in the staying water Wst. For this reason, among the plurality of water spray holes 461, the amount of bubbles mixed in the water flow discharged from the front water spray hole group 461F is smaller than the amount of bubbles mixed in the water flow discharged from the rear water spray hole group 461B. Become.

  Due to the difference in the amount of air bubbles mixed in, the water flow discharged from each of the front-side sprinkling hole group 461F and the rear-side sprinkling hole group 461B of the shower water spouting portion 40s has different characteristics. Specifically, in the water flows Jf1 and Jf2 discharged from the front-side sprinkling hole group 461F, the amount of air bubbles mixed in is relatively small, so that a large flow velocity difference is hardly generated in each water flow. For this reason, the water mass formed in the water streams Jf1 and Jf2 becomes relatively small, and becomes relatively small water droplets Wdf near the article 90 to be cleaned. Therefore, the water splash at the time of landing on the cleaning object 90 is relatively light (arrow Wf in FIG. 8B).

  On the other hand, in the water flows Jb1 to Jb4 discharged from the rear-side sprinkling hole group 461B, the amount of air bubbles mixed in is relatively large, so that a large flow velocity difference tends to occur in each water flow. For this reason, the water mass formed in the water flows Jb1 to Jb4 is also relatively large, and becomes relatively large water droplets Wdb near the article 90 to be cleaned. Therefore, the water splash at the time of landing on the object 90 to be cleaned becomes conspicuous as compared with the water discharged from the front-side sprinkling hole group 461F (arrow Wb in FIG. 8B). The increase in cleaning power can be expected.

  Thereby, the water flow Jb1 to Jb4 discharged from the rear-side sprinkling hole group 461B increases the cleaning power at the time of landing on the article 90 to be cleaned, and is discharged from the front-side sprinkling hole group 461F close to the user H. The water flows Jf1 and Jf2 can suppress water splash at the time of landing. In other words, the shower water flow Ws is supplied toward the diagonally downward front where the user is present, improving the workability at the time of washing and improving the washing performance using a large water mass, but the use that causes a problem in actual use It becomes possible to suppress water splash to the person side.

  The embodiments of the present invention have been described above with reference to specific examples. However, the present invention is not limited to these specific examples. In other words, those specific examples that have been appropriately modified by those skilled in the art are also included in the scope of the present invention as long as they have the characteristics of the present invention. For example, the elements included in each of the specific examples described above and their arrangement, materials, conditions, shapes, sizes, and the like are not limited to those illustrated, but can be changed as appropriate. Moreover, each element with which each embodiment mentioned above is provided can be combined as long as technically possible, and the combination of these is also included in the scope of the present invention as long as it includes the features of the present invention.

KF: Kitchen faucet 10: System kitchen 20: Sink 30: Mounting part 40: Spout part 40r: Rectification water discharge part 40s: Shower water discharge part 90: To-be-washed object 410: Spout part main body 411: Water supply flow path 414: Rectification flow Channel 415: Shower channel 416: Air inlet 417: Air inlet 420: Injection plate 421: Injection port 430: Air suction chamber 440: Throat member 441: Throat 442: Inner wall surface (of throat) 450: Air mixing chamber 460: Watering plate 461: Watering hole

Claims (6)

A kitchen faucet used to supply water to a kitchen,
A mounting part to be attached to the kitchen;
A spout portion provided above the mounting portion and extending upward so as to incline toward the front side of the user;
A shower spout unit provided on an outer surface on the front side of the spout unit, having a plurality of water spray holes, and supplying a plurality of water streams discharged from the plurality of water sprinkle holes as a shower water stream obliquely downward and forward;
A bubble mixing part for mixing bubbles in the water supplied to the shower water spouting part,
The plurality of water holes are at least divided into a front water hole group provided on the front side and a rear side water hole group provided on the rear side of the front water hole group,
It is mixed by the bubble mixing unit so that the amount of bubbles mixed into the water flow discharged from the front watering hole group is smaller than the amount of bubbles mixed into the water flow discharged from the rear watering hole group. A kitchen faucet comprising a bubble movement restraining means for restraining the air bubbles from moving to the front watering hole group side. The bubble mixing part is
An injection unit having at least one injection port that increases the flow rate of water supplied from the upstream side and injects it as a jet water flow on the downstream side;
An air suction part for sucking air by a negative pressure generated with the passage of the jet water flow;
An air mixing part for mixing the air sucked by the air suction part into the jet water flow;
Have
The injection port is a kitchen faucet according to claim 1, characterized by being provided near beside the shower water discharger. Before Symbol injection port, the injection water flow injection, kitchen faucet according to claim 2, characterized in that the movement of air bubbles into the front nozzle holes group side is configured to be suppressed.   4. The kitchen faucet according to claim 3, wherein the injection port is configured to inject an injection water flow toward the rear-side sprinkling hole group.   When the shower spout is viewed in the direction in which the jet outlet jets the jet water flow, the jet outlet and at least a part of the sprinkling holes constituting the rear side sprinkling hole group are arranged to overlap. The kitchen faucet according to claim 4, wherein:   Between the front-side sprinkling hole group and the rear-side sprinkling hole group in the aeration unit, the jet water flow collides with an inner wall surface of the shower spout and flows to the front-side sprinkling hole group side. The kitchen faucet according to claim 4, further comprising: a jet movement restraint wall that restrains movement of bubbles to the front watering hole group.

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